(function () {
  

  var designwidth = 750;
  var fontsize = 100;
  function resize() {
    var width = document.documentElement.clientWidth;
    var size = width / designwidth * fontsize;
    var html = document.querySelector('html');
    html.style.fontSize = size + "px";
  }
  resize();
  window.onresize = resize;
})(window, document);
